Old Faithful With Bears Yellowstone NP Wyoming Mirro-Krome Vintage Postcard

Description

Front:
[Depicts the Old Faithful Geyser and some bears]
Back:
Old Faithful and Bears
Yellowstone National Park
Oblivious to the beauty of Old Faithful behind them a mother and her cubs search for tidbits.
Photo by William S. Keller
163
Published exclusively by Hamilton Stores Inc., Yellowstone National Park
Mirro-Krome Card by H.S. Crocker Co., Inc., San Bruno, Calif. 94066
Exact measurements:
14x8.9 centimeters =  5.51x3.5 inches.
Scroll down for more card background information.
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PROCEDURE AND SHIPPING
Photos scanned at 600 dpi, zoom in to see detail. Actual item for sale is shown in photos. Colored edge around photos is my photo mat, not the card.
All postcards are sent in an archival quality protective sleeve. Postcards are shipped in a rigid photo mailer to prevent crushing.
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Information on this listing is provided to the best of our ability. If you encounter errors, please let us know.
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CARD BACKGROUND INFORMATION
Old Faithful is a cone geyser located in Yellowstone National Park in Wyoming, United States. It was named in 1870 during the Washburn-Langford-Doane Expedition and was the first geyser in the park to receive a name. It is a highly predictable geothermal feature, and has erupted every 44 to 125 minutes since 2000. The geyser and the nearby Old Faithful Inn are part of the Old Faithful Historic District.
More than 1,000,000 eruptions have been recorded. Harry Woodward first described a mathematical relationship between the duration and intervals of the eruptions in 1938. Old Faithful is not the tallest or largest geyser in the park; those titles belong to the less predictable Steamboat Geyser. The reliability of Old Faithful can be attributed to the fact that it is not connected to any other thermal features of the Upper Geyser Basin.
Eruptions can shoot 3,700 to 8,400 US gallons (14,000 to 32,000 L) of boiling water to a height of 106 to 185 feet (32 to 56 m) lasting from ​1 1⁄2 to 5 minutes. The average height of an eruption is 145 feet (44 m). Intervals between eruptions can range from 35 to 120 minutes, averaging 66.5 minutes in 1939, slowly increasing to an average of 90 minutes apart today, which may be the result of earthquakes affecting subterranean water levels. The disruptions have made earlier mathematical relationships inaccurate, but have actually made Old Faithful more predictable in terms of its next eruption.
The time between eruptions has a bimodal distribution, with the mean interval being either 65 or 91 minutes, and is dependent on the length of the prior eruption. Within a margin of error of ±10 minutes, Old Faithful will erupt either 65 minutes after an eruption lasting less than ​2 1⁄2 minutes, or 91 minutes after an eruption lasting more than ​2 1⁄2 minutes.
Between 1983 and 1994, four probes containing temperature and pressure measurement devices and video equipment were lowered into Old Faithful. The probes were lowered as deep as 72 feet (22 m). Temperature measurements of the water at this depth was 244 °F (118 °C), the same as was measured in 1942. The video probes were lowered to a maximum depth of 42 feet (13 m) to observe the conduit formation and the processes that took place in the conduit. Some of the processes observed include fog formation from the interaction of cool air from above mixing with heated air from below, the recharge processes of water entering into the conduit and expanding from below, and entry of superheated steam measuring as high as 265 °F (129 °C) into the conduit.
*Background information gathered from Wikipedia,
The Free Encyclopedia.
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